Sliding current collector for electric vehicles



vAllg- 2 J. F. DE TOVAROS 1,723,139

SLIDING CURRENT COLLECTOR FOR ELECTRIC VEHICLES Filed April 6. 1927 Jalzhsiz'ls'derdefdvma Snventor,

attorney Patented Aug. 6, 1929.

PATENT OFFICE.

JULIUS FISCHER DE TOVAROS, OF BUDAPEST, HUNGARY.

SLIDING CURRENT COLLECTOR FOR ELECTRIC VEHICLES.

Application filed April 6, 1927, Serial No. 181,575, and in Hungary January 28, 1927.

In the case of sliding current collectors which contact with the line conductors along awide contact surface and are pivotally mounted to enable them to bear along the whole width of the surface of contact in the direction of running, it is important to ensure that the current collector shall remain smooth on its contact surface as well as at its edges. In order to reduce the weight of the collector, it must be made either of a very light metal, such as aluminum, or of a metal of very high strength, such iron or steel. These metals, however, are severely affected by the sparking at the edges of the collector which produces hardened )arts, so that in both cases the formation of projections and recesses caused by burning at the edge of the contact surface cannot be avoided.

According to the present invention, the edges of the contact surface of the sliding current collector are provided with framing ledges of brass or other metal or alloy having a higher electrical and heat conductivity than iron, so that the framing ledge faces which contact with the line conductor enclose the contact surface of the collector fixed beween the said ledges.

Several forms of the current collector constructed according to this invention are shown by way of example, in cross section in the accompanying drawing.

In Figure 1, a is the sliding contact made of an iron or steel plate and provided at its turned-over edges 6 with riveted or welded framing ledges 0 of brass. The contact faces (Z of these ledges, which touch the line conductor, frame the contact surface 6 of the iron plate situated between the ledges.

Figure 2 shows a modified construction in which the framing ledges 0 rest on the projecting edges 7 of the plate or. This arrangement may be usefully employed when the framing ledge c is madeof a material of low strength, such as for instance, carbon.

Figure 3 shows a construction in which the 5 framing ledge 0 overlaps the underface of the contact plate a at g and is secured to the same, for instance, by soldering, brazing or welding.

According to Figure 4, the contact plate a is butt-welded tothe framing ledge c at 1, so that the framing ledges form one unbroken unit with the contact plate.

Figure 5 shows a current collector of triangular cross-section with three iron or steel workin g faces which are provided with brass framing ribs 6 arranged at the angles of the triangle and welded, or sprayed on by means of the Schoop process.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be per formed, I declare, that what I claim is 1. A current collector having a wide sheet metal member for sliding surface contact along a line conductor, and framing ledges extending along and secured to the edges of said contact member; such ledges being made of a metal having a higher electrical and heat conductivity than iron or steel, and forming part of the contact surface of the collector.

2. A current collector for sliding surface contact along a line conductor, comprising a metal contact member provided at its opposite ends with ledges which constitute part of the contact surface of the collector and which are made of a metal that will form no hardened projections under the action of sparking.

3. A current collector according to claim 2, 30 in which the contact member consists of an iron plate provided at its opposite ends with brass ledges.

In testimony whereof I affix my signature.

JULIUS FISCHER DE TOVAROS. 

